invoke active_record
create db/migrate/20140901111733_devise_create_fd_users.rb/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:541:in`retrieve_connection': ActiveRecord::ConnectionNotEstablished (ActiveRecord::ConnectionNotEstablished)
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/activerecord-4.1.5/lib/active_record/connection_handling.rb:113:in `retrieve_connection'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/activerecord-4.1.5/lib/active_record/connection_handling.rb:87:in `connection'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/devise-3.3.0/lib/generators/active_record/devise_generator.rb:86:in`postgresql?'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/devise-3.3.0/lib/generators/active_record/devise_generator.rb:78:in `inet?'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/devise-3.3.0/lib/generators/active_record/devise_generator.rb:74:in `ip_column'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/devise-3.3.0/lib/generators/active_record/devise_generator.rb:56:in`migration_data'
from (erb):4:in `migration_template'
from /Users/user/.rvm/rubies/ruby-1.9.3-p547/lib/ruby/1.9.1/erb.rb:838:in `eval'from/Users/user/.rvm/rubies/ruby-1.9.3-p547/lib/ruby/1.9.1/erb.rb:838:in`result'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators/migration.rb:64:in `block in migration_template'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions/create_file.rb:53:in `call'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions/create_file.rb:53:in`render'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions/create_file.rb:62:in `block (2 levels)in invoke!'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions/create_file.rb:62:in `open'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions/create_file.rb:62:in`block in invoke!'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions/empty_directory.rb:116:in `call'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions/empty_directory.rb:116:in `invoke_with_conflict_check'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions/create_file.rb:60:in`invoke!'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/actions.rb:94:in `action'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators/migration.rb:34:in `create_migration'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators/migration.rb:63:in`migration_template'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/devise-3.3.0/lib/generators/active_record/devise_generator.rb:16:in `copy_devise_migration'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:126:in`invoke_command'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `block in invoke_all'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `each'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in`map'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `invoke_all'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:232:in `dispatch'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:115:in`invoke'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:277:in `block in _invoke_for_class_method'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/shell.rb:68:in `with_padding'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:266:in`_invoke_for_class_method'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:149:in `_invoke_from_option_orm'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:126:in`invoke_command'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `block in invoke_all'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `each'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in`map'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `invoke_all'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:232:in `dispatch'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/base.rb:440:in`start'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators.rb:157:in `invoke'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/commands/generate.rb:11:in `<top (required)>'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in`require'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `block inrequire'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:232:in `load_dependency'from/Users/user/.rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in`require'
from /Users/user/.rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/engine/commands.rb:19:in `<top (required)>'
from bin/rails:12:in `require'

I thought Database connection not established properly so i tested using the command

rails generate model Test name:string email:string

its working properly, then i gave

rake db:migrate

Now database also migrated successfully, so i think database connection is properly working. The commands mentioned above were run from Engine's Directory. If any information needed comment it out i will provide the details. Thanks